Investigators looking into a bogus claim for a $14.3 million Iowa Lottery jackpot in 2011 have received valuable information from a man in Canada who has been granted immunity from prosecution.

An Iowa Division of Criminal Investigation agent traveled to Canada to conduct an interview a month ago after reaching an agreement in which a person of interest was guaranteed he wouldn't face prosecution related to the jackpot claim.

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Assistant DCI Director Gerard Meyers says investigators have been working since then to verify the information and locate and interview others who may be involved.

The development has breathed new life into the investigation.

A New York lawyer came forward with the winning ticket hours before the one-year deadline, but later withdrew the claim rather than prove it'd been legally possessed.